The Master System Flash cart support the Sega Mapper implemented in an Altera EPM3064 with up to 8Mbit with a x29Fx00 Flash IC in a TSOP48 package. Two pages of SRAM (32KB total) can be battery-backed for save files.
8Mbit SRAM SMT
- Sega Mapper supporting 8Mbits and 32KB SRAM
- VHDL source available here
- Advanced battery circuit ensures no leakage through #CE pin without expensive battery monitor IC
- Battery can be replaced without any soldering
Sega Master System cartridge PCBs are 1.6mm thick.